Study of the curing mechanism of metal alkoxide liquid threads for the synthesis of metal oxide fibers or microtubes

Rheological Properties of MWCNT-Doped Titanium-Oxo-Alkoxide Gel Materials for Fiber Drawing

“…The heat treatment of the as-prepared materials was carried out after their aging in order to determine the temperature required to burn-off organics from oxide material while preserving carbon nanotubes. The thermal behavior of sol-gel prepared fibers is discussed in our earlier study [ 19 ], while a comparison of thermal oxidation of amorphous carbon vs. CNTs is discussed in [ 53 ]. It was shown also in this work that when using those particular kinds of CNTs purchased from Cheap Tubes Inc. (in the literature, there is significant evidence that the properties of the carbon nanotubes that are provided by different producers vary largely), thermal treatment at 350 °C in the air can be applied for that purpose.…”

“…Previously we have demonstrated that chemical reactions of alkoxides of different metals proceed with significantly different kinetics [ 19 ]. For example, gelation of titanium butoxide sols occurs much more homogeneously with the formation of Van der Waals bonds in the beginning of process as compared to zirconium butoxide sols, which immediately lose a majority of alkoxy groups in a contact with water, therefore releasing a significant amount of alkoxy groups and forming strong covalent bonds between the metal-oxo-alkoxy sol particles.…”

Application of Y–ZrO2 microtubes as dielectric barrier material in a He atmospheric pressure micro-plasma jet

“…The 8% YSZ microtubes used in the current study were prepared as thoroughly described and characterized in previous publications [30,37,38]. The YSZ microtube was melt-jointed onto a top of a large quartz Pasteur pipette capillary (inner diameter ID = 5.5 mm) which narrowed down to about 100 µm on the one end, similarly as described in [30].…”

“…Y-ZrO 2 or YSZ is a material, where yttria is required to stabilize zirconia at room temperature in the tetragonal/ cubic phase. YSZ has high dielectric constant (32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42) [31], refractive index (2.15-2.2) [32,33] excellent mechanical properties and fracture toughness, chemical resistance and biocompatibility. Due to those properties, YSZ is a very important engineering material that has found use in various fields ranging from dentistry [34] to metallurgy [35].…”

“…High-temperature ionic conductance of YSZ enables the use as electrolyte in solid oxide fuel cells [36]. In our previous works, a method was proposed for the preparation of high-quality YSZ microtubes with a diameter below 100 µm and wall thickness less than 20 µm [30,37,38]. The tubes were composed of structurally homogeneous 100% cubic phase 8% yttria-stabilized zirconia.…”